Preheat the oven to 325F,Grease a 9"x5" loaf pan and set aside.,______,In a medium bowl, mix the mashed bananas, yogurt, eggs, butter, and vanilla extract together.,Lightly fold the banana mixture into the dry ingredients until just combined and the batter looks thick and chunky.,Spoon the batter into the loaf pan and smooth the surface with a spatula.,Bake for 70-75 minutes or until the loaf is golden brown and a toothpick comes out clean.,Cool in the pan for about 5 minutes and then turn out onto a wire rack and allow to cool the rest of the way.